Dispersive Impurities in one-dimensional Fermi Gases: From one to two Channel Kondo Polarons

ORAL

Abstract

We consider the problem of a dispersive magnetic impurity interacting antiferromagnetically with a one dimensional fermionic gas. By combining general considerations and extensive numerical simulations we show that the problem displays a quantum phase transition between two-channel and one-channel Kondo behaviour upon increasing the Kondo coupling and construct a phase diagramme. We also discuss possible experimental realisations.

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Authors

  • Karen Hallberg

    • Centro Atomico Bariloche and Instituto Balseiro, CNEA, CONICET, Bariloche, Argentina

  • Julian Rincon

    • Oak Ridge National Laboratory, USA

  • Daniel Garcia

    • Centro Atomico Bariloche and Instituto Balseiro, CNEA, CONICET, Bariloche, Argentina

  • Matthias Vojta

    • Institut f\"ur Theoretische Physik, Technische Universit\"at Dresden, 01062 Dresden, Germany